/* Shared reading surfaces under cool sunlight or warm lamplight. */
:root {
  --paper: #e7f0f2;
  --white: #f8fbfa;
  --ink: #153348;
  --muted: #47616d;
  --blue: #175b78;
  --blue-hover: #103f57;
  --blue-soft: #d9ebef;
  --line: #a9c6d0;
  --green: #3c614d;
  --red: #963d32;
  --paper-shadow: 0 18px 50px rgb(69 44 28 / 9%), 0 2px 8px rgb(69 44 28 / 5%);
  --body-glow-rgb: 155 199 219;
  --body-glow-alpha: 26%;
  --body-glow: rgb(var(--body-glow-rgb) / var(--body-glow-alpha));
  --body-glow-x: 80%;
  --body-glow-y: 135px;
  --body-glow-radius: 32rem;
  --reading-background: radial-gradient(circle at var(--body-glow-x) var(--body-glow-y), var(--body-glow), transparent var(--body-glow-radius)), var(--paper);
}

:root[data-light-mode="lamp"] {
  --paper: #272320;
  --white: #342e29;
  --ink: #fff0db;
  --muted: #d1c1ab;
  --blue: #f1bd80;
  --blue-hover: #ffd3a0;
  --blue-soft: #4a3a2e;
  --line: #74685a;
  --green: #a6d3b2;
  --red: #f1a997;
  --paper-shadow: 0 22px 56px rgb(0 0 0 / 25%), 0 2px 10px rgb(0 0 0 / 12%);
  --body-glow-rgb: 194 112 52;
  --body-glow-alpha: 15%;
  color-scheme: dark;
}

html { scroll-behavior: smooth; }
body {
  background: var(--reading-background);
  color: var(--ink);
}
.shell { max-width: 1180px; }
.header { min-height: 90px; }
.wordmark { font-style: italic; letter-spacing: -.045em; }
nav { gap: 22px; }
nav a { color: var(--muted); }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }
.nav-contact { color: var(--ink); }
.light-switch {
  align-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  display: inline-grid;
  grid-template-columns: max-content 16px;
  gap: 11px;
  justify-content: space-between;
  min-height: 44px;
  padding: 8px 12px 8px 16px;
  white-space: nowrap;
  font-size: .875rem;
  -webkit-user-select: none;
  user-select: none;
  transition: background-color 160ms ease, border-color 160ms ease, transform 160ms ease;
}
.light-switch > * { pointer-events: none; }
.light-switch:hover { background: var(--blue-soft); border-color: var(--blue); }
.light-switch:disabled { cursor: default; opacity: .6; }
.light-switch-day, .light-switch-lamp { grid-column: 1; grid-row: 1; visibility: hidden; }
:root:not([data-light-mode="lamp"]) .light-switch-day,
:root[data-light-mode="lamp"] .light-switch-lamp { visibility: visible; }
.light-switch-dot {
  grid-column: 2;
  grid-row: 1;
  background: var(--paper);
  border: 1px solid var(--blue);
  border-radius: 50%;
  box-shadow: inset -5px -3px 0 var(--blue);
  display: block;
  height: 16px;
  width: 16px;
  transition: background-color 190ms ease, box-shadow 190ms ease;
}
:root[data-light-mode="lamp"] .light-switch-dot { background: var(--blue); box-shadow: 0 0 12px rgb(240 186 141 / 55%); }
.primary { background: var(--blue); color: var(--white); }
.primary:hover { background: color-mix(in srgb, var(--blue) 86%, white); color: var(--white); }
.button, button:not(:disabled) { transition-property: background-color, border-color, color, transform; transition-duration: 160ms, 160ms, 160ms, 120ms; transition-timing-function: ease, ease, ease, cubic-bezier(.2,.8,.2,1); }
.button:active, button:not(:disabled):active { transform: translateY(1px) scale(.985); }
.text-link { color: var(--blue); }
a:hover { color: var(--blue-hover); }
a:not(.button):not(.skip) { position: relative; top: 0; transition: color 160ms ease, top 120ms cubic-bezier(.2,.8,.2,1); }
a:not(.button):not(.wordmark):hover { color: var(--blue); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .3em; }
a:not(.button):not(.skip):active { top: 1px; }

/* The homepage is a frosted glass-block lantern; its project links are the clear foreground. */
body.home {
  --panel-padding: clamp(22px, 3vw, 40px);
  --lantern-ground: #3d84ad;
  --lantern-wash: rgb(242 250 251 / 60%);
  background-color: var(--lantern-ground);
  isolation: isolate;
  position: relative;
}
/* One continuous facade. Native page scrolling moves it without a scroll handler. */
.home .lantern-wall {
  --pane: 30px;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  position: absolute;
  z-index: -2;
  background: linear-gradient(110deg, rgb(21 66 96 / 17%), transparent 48%, rgb(238 248 251 / 12%));
}
.home .lantern-wall::before {
  background:
    radial-gradient(ellipse 34rem 13rem at 82% 240px, #ffdd94 0%, rgb(255 173 66 / 85%) 26%, rgb(237 128 33 / 36%) 56%, transparent 83%),
    radial-gradient(ellipse 40rem 16rem at 18% 940px, #ffd48a 0%, rgb(255 176 78 / 79%) 28%, rgb(227 124 40 / 30%) 59%, transparent 85%),
    radial-gradient(ellipse 33rem 15rem at 83% 1580px, #ffdfa2 0%, rgb(255 165 52 / 81%) 25%, rgb(225 121 34 / 30%) 61%, transparent 86%),
    radial-gradient(ellipse 38rem 18rem at 30% 2380px, #ffda97 0%, rgb(255 176 66 / 77%) 30%, rgb(219 113 32 / 28%) 62%, transparent 87%),
    radial-gradient(ellipse 32rem 17rem at 76% 3250px, #ffd891 0%, rgb(255 171 65 / 74%) 30%, transparent 85%);
  content: '';
  filter: blur(12px);
  inset: -16px;
  opacity: .065;
  position: absolute;
}
:root[data-light-mode="lamp"] .home .lantern-wall { background: rgb(26 24 22 / 27%); }
:root[data-light-mode="lamp"] .home .lantern-wall::before { opacity: .94; }
.home .lantern-wall::after {
  opacity: .45;
  background-image:
    linear-gradient(90deg, rgb(13 34 45 / 49%) 0 1px, rgb(233 244 247 / 49%) 1px 2px, transparent 3px 27px, rgb(13 34 45 / 25%) 29px 30px),
    linear-gradient(0deg, rgb(13 34 45 / 49%) 0 1px, rgb(233 244 247 / 39%) 1px 2px, transparent 3px 27px, rgb(13 34 45 / 24%) 29px 30px),
    linear-gradient(140deg, rgb(247 251 250 / 19%), transparent 42%, rgb(23 29 30 / 10%));
  background-size: var(--pane) var(--pane), var(--pane) var(--pane), var(--pane) var(--pane);
  content: '';
  inset: 0;
  position: absolute;
}
body.home::before {
  background: var(--lantern-wash);
  content: '';
  inset: 0;
  pointer-events: none;
  position: fixed;
  z-index: -1;
}
:root[data-light-mode="lamp"] body.home {
  --lantern-ground: #96532c;
  --lantern-wash: rgb(19 17 16 / 42%);
}

/* One readable page grid; project links are available without selection or scripts. */
.header { gap: 24px; padding-inline: 0; }
.header nav a.nav-work, .header nav a.nav-resume, .header nav a.nav-contact { display: inline-flex; align-items: center; min-height: 44px; }
.header nav { flex-shrink: 0; margin-left: auto; }
.home .header, .home .footer { background: color-mix(in srgb, var(--white) 94%, transparent); border: 1px solid var(--line); padding-inline: var(--panel-padding); }
.home .hero, .selected-work, .home .about, .home .contact { background: var(--white); border: 1px solid var(--line); border-radius: 3px; padding: var(--panel-padding); }
.hero { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: 52px; align-items: center; margin-block: 36px; }
.hero-copy { min-width: 0; }
.hero h1 { font-size: clamp(3.1rem, 5.4vw, 5.2rem); line-height: 1.02; letter-spacing: -.025em; margin: 0 0 24px; }
.hero-specialty, .hero-role { display: block; }
.hero-specialty { font-size: .78em; }
.identity { color: var(--muted); font-size: .95rem; margin-bottom: 16px; }
.hero-lead { color: var(--ink); font-size: 1.0625rem; line-height: 1.7; max-width: 36rem; margin-bottom: 28px; }
.hero-actions, .case-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 24px; }
.experience { border-left: 1px solid var(--line); padding-left: 32px; margin: 0; }
.experience > div + div { margin-top: 30px; }
.experience dt { color: var(--blue); font-family: var(--serif); font-size: 2.3rem; line-height: 1.15; }
.experience dd { color: var(--muted); font-size: .9rem; line-height: 1.6; margin: 7px 0 0; }
.experience > div:last-child dt { font-family: var(--sans); font-size: 1rem; font-weight: 600; line-height: 1.5; }
.selected-work { margin-block: 36px; scroll-margin-top: 24px; }
.selected-work > h2, .about h2, .contact h2 { font-size: clamp(2.4rem, 4vw, 3.5rem); line-height: 1.08; margin: 0; }
.selected-work > h2 { margin-bottom: 30px; }
.project-row { border-top: 1px solid var(--line); display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.35fr); gap: 44px; padding-block: 30px; }
.project-row > div { min-width: 0; }
.project-row h3 { font-family: var(--serif); font-size: clamp(1.8rem, 3vw, 2.6rem); line-height: 1.15; }
.project-link { display: flex; gap: 18px; align-items: baseline; justify-content: space-between; min-height: 44px; color: var(--ink); text-decoration: none; }
.project-link > span { color: var(--blue); font-family: var(--sans); font-size: 1.1rem; flex: none; }
.project-link:hover { color: var(--blue); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.project-context { color: var(--muted); font-size: .85rem; margin-top: 12px; }
.project-row > div > p:not(.project-context) { font-size: 1rem; line-height: 1.7; }
.project-row .project-result { color: var(--muted); font-size: .9rem; margin-top: 12px; }
.project-result a { color: var(--blue); display: inline-flex; align-items: center; min-height: 44px; margin-right: 18px; text-underline-offset: 4px; }
.work-download { padding-top: 22px; }
.about { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, .9fr); grid-template-rows: auto 1fr; grid-template-areas: 'heading portrait' 'copy portrait'; gap: 22px 44px; margin-block: 36px; scroll-margin-top: 24px; }
.about h2 { grid-area: heading; }
.about-copy { grid-area: copy; min-width: 0; }
.about-portrait { grid-area: portrait; position: relative; align-self: stretch; margin: 0; min-width: 0; min-height: 0; }
.about-portrait img { position: absolute; inset: 0; display: block; width: 100%; height: 100%; object-fit: cover; object-position: center 18%; border-radius: 2px; outline: 1px solid rgb(0 0 0 / 10%); outline-offset: -1px; }
:root[data-light-mode="lamp"] .about-portrait img { outline-color: rgb(255 255 255 / 10%); }
.about p:not(.eyebrow) { color: var(--ink); font-size: 1rem; line-height: 1.75; max-width: 38rem; margin: 0 0 18px; }
.about .quiet-link { color: var(--blue); }
.about-profiles { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.contact { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 28px; margin-block: 36px; scroll-margin-top: 24px; }
.contact p { color: var(--muted); max-width: 32rem; margin-top: 16px; }
.contact-actions { display: flex; align-items: flex-start; flex-direction: column; gap: 14px; }
.footer { flex-wrap: wrap; margin-top: 36px; margin-bottom: 0; }
.footer p { width: auto; color: var(--muted); }
.footer time { white-space: nowrap; font-variant-numeric: tabular-nums; }

/* Case studies put the evidence before optional interactive exhibits. */
.case-hero { padding-block: 28px 36px; }
.back-link { margin-bottom: 28px; }
.case-hero h1 { font-size: clamp(3rem, 5vw, 5rem); max-width: none; letter-spacing: -.02em; text-wrap: wrap; }
.case-deck { color: var(--ink); font-size: 1.125rem; line-height: 1.7; max-width: none; margin-top: 24px; text-wrap: pretty; }
.case-ownership { color: var(--muted); max-width: none; line-height: 1.7; margin-top: 18px; }
.case-actions { margin-top: 26px; }
.case-details { display: grid; grid-template-columns: 1.4fr 1fr 1fr; border-block: 1px solid var(--line); gap: 24px; margin: 32px 0 0; padding-block: 22px; }
.case-details dt { font-size: .82rem; color: var(--muted); margin-bottom: 7px; }
.case-details dd { color: var(--ink); margin: 0; line-height: 1.6; font-size: .95rem; }
.case-body { display: block; padding: 0 0 32px; }
.case-section { display: grid; grid-template-columns: minmax(0, .6fr) minmax(0, 2fr); gap: 48px; padding-block: 28px; }
.case-section + .case-section { border-top: 1px solid var(--line); }
.case-section > h2 { font-family: var(--sans); font-size: 1.05rem; font-weight: 600; line-height: 1.5; }
.section-copy { min-width: 0; max-width: 48rem; }
.section-copy p { font-size: 1rem; line-height: 1.8; margin: 0 0 18px; }
.section-copy > :last-child { margin-bottom: 0; }
.section-copy .evidence-note { color: var(--muted); font-size: .87rem; line-height: 1.7; }
.evidence-links { display: flex; flex-wrap: wrap; align-items: center; gap: 0 22px; margin-block: 8px 18px; }
.evidence-links a, .contribution > a { display: inline-flex; align-items: center; min-height: 44px; color: var(--blue); font-size: .95rem; overflow-wrap: anywhere; text-underline-offset: 4px; }
.contribution { border-top: 1px solid var(--line); padding: 24px 0; margin: 0; }
.contribution:last-child { padding-bottom: 0; }
.contribution h3 { font-size: 1.2rem; font-weight: 600; line-height: 1.4; margin: 0 0 12px; }
.contribution p { margin-bottom: 8px; }
.contribution .contribution-date { font-size: .8rem; color: var(--muted); margin: 0; }
.case-demo { border: 1px solid var(--line); border-radius: 3px; background: var(--white); margin-block: 16px 36px; }
.case-demo > summary { align-items: center; color: var(--blue); cursor: pointer; display: flex; gap: 24px; justify-content: space-between; list-style: none; min-height: 72px; padding: 18px 28px; font-size: 1rem; }
.case-demo > summary::-webkit-details-marker { display: none; }
.case-demo > summary > span { font-size: 1.4rem; line-height: 1; }
.case-demo[open] > summary { border-bottom: 1px solid var(--line); }
.case-demo[open] > summary > span { transform: rotate(45deg); }
.case-demo .lab { border: 0; background: var(--white); border-radius: 0; margin: 0; padding: 32px; }
.lab-heading h2 { font-size: clamp(2.2rem, 3.7vw, 3.2rem); }
.lab-heading > p { font-size: .85rem; }
.case-end { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px 32px; padding-block: 10px 40px; }
.case-end > a { color: var(--blue); min-height: 44px; display: inline-flex; align-items: center; gap: 12px; text-underline-offset: 4px; }
.reveal-content { min-width: 0; }
.lab-toolbar { padding-bottom: 18px; }
.segmented label:hover span, .workflow-picker label:hover span { background: var(--blue-soft); }
.segmented input:disabled + span, .workflow-picker input:disabled + span { opacity: .6; }
.segmented label:has(input:disabled), .workflow-picker label:has(input:disabled) { cursor: default; }
.segmented label:hover input:disabled + span, .workflow-picker label:hover input:disabled + span { background: transparent; }
.segmented input:checked + span, .workflow-picker input:checked + span { background: var(--ink); color: var(--white); }
.trace-steps { position: relative; }
.trace-steps::before { background: var(--line); content: ''; left: 25px; position: absolute; top: 31px; bottom: 31px; width: 1px; }
.trace-steps::after { background: var(--blue); content: ''; left: 25px; position: absolute; top: 31px; bottom: 31px; width: 2px; transform: scaleY(0); transform-origin: top; transition: transform 280ms cubic-bezier(.2,.7,.2,1); }
.trace-steps[data-step="1"]::after { transform: scaleY(.24); }
.trace-steps[data-step="2"]::after { transform: scaleY(.5); }
.trace-steps[data-step="3"]::after { transform: scaleY(.75); }
.trace-steps[data-step="4"]::after { transform: scaleY(1); }
.trace-steps li { transition: background-color 180ms ease, color 180ms ease, transform 180ms ease; }
.trace-steps li[aria-current="step"] { transform: translateX(4px); }
.trace-step { display: flex; align-items: flex-start; gap: 19px; width: 100%; min-height: 44px; padding: 0; border: 0; background: transparent; color: inherit; text-align: left; cursor: pointer; }
.trace-step > span { min-width: 20px; padding-top: 3px; color: var(--muted); font-size: .8125rem; }
.trace-steps li:has(.trace-step:hover) { background: var(--blue-soft); color: var(--blue); }
.trace-inspector { background: var(--paper); border-color: var(--line); transition: background-color 220ms ease, box-shadow 220ms ease; }
.lab[data-outcome="fixed"] .trace-inspector { box-shadow: inset 0 0 0 1px var(--green); }
.lab[data-outcome="broken"] .trace-inspector { box-shadow: inset 0 0 0 1px var(--red); }
.component-button { color: var(--ink); transition: background-color 170ms ease, border-color 170ms ease, transform 170ms ease; }
.component-button:hover { background: var(--blue-soft); transform: translateY(-2px); }
.component-button:active { transform: translateY(0); }
.component-detail, .trace-inspector { background: var(--paper); }
.component-detail { view-transition-name: component-note; }
.workflow-content { view-transition-name: workflow-note; }
.plain-fallback { color: var(--muted); font-size: .92rem; margin-top: 16px; }
.workflow-picker span { transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease; }
.workflow-stage { min-width: 0; }

::view-transition-old(component-note), ::view-transition-old(workflow-note) { animation: note-leave 140ms ease-out both; }
::view-transition-new(component-note), ::view-transition-new(workflow-note) { animation: note-arrive 180ms ease-out both; }
@keyframes note-arrive { from { opacity: .5; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
@keyframes note-leave { to { opacity: 0; transform: translateY(-3px); } }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px; transition: none; }
.light-switch:focus-visible { outline-offset: 0; }
h1[tabindex="-1"]:focus-visible, h2[tabindex="-1"]:focus-visible { outline: 2px solid var(--blue); outline-offset: 7px; }
@media (max-width: 1000px) {
  .hero { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 32px; }
  .hero h1 { font-size: clamp(3.2rem, 5.8vw, 4.6rem); }
  .experience { padding-left: 24px; }
  .experience dt { font-size: 1.9rem; }
  .case-section { grid-template-columns: minmax(0, .7fr) minmax(0, 2fr); gap: 30px; }
}
@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; grid-template-rows: auto; grid-template-areas: 'heading' 'copy' 'portrait'; }
  .about-portrait { width: min(100%, 20rem); aspect-ratio: 4 / 5; }
}
@media (max-width: 760px) {
  .header { min-height: 80px; gap: 18px; }
  .header nav { gap: 14px; }
  .wordmark { font-size: 2rem; }
  .hero { grid-template-columns: 1fr; gap: 30px; margin-block: 24px; }
  .hero h1 { font-size: clamp(3.1rem, 8.4vw, 4.6rem); }
  .hero-lead { font-size: 1rem; }
  .experience { border-left: 0; border-top: 1px solid var(--line); padding: 24px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .experience > div + div { margin: 0; }
  .experience > div:last-child { grid-column: 1 / -1; }
  .experience dt { font-size: 1.8rem; }
  .selected-work, .about, .contact { margin-block: 24px; }
  .project-row, .about { grid-template-columns: 1fr; gap: 18px; }
  .about-portrait { width: min(100%, 13rem); }
  .project-row h3 { font-size: 2rem; }
  .project-row { padding-block: 24px; }
  .case-hero h1 { font-size: clamp(2.7rem, 8vw, 4.4rem); }
  .case-deck { font-size: 1rem; }
  .case-details { grid-template-columns: 1fr; gap: 18px; }
  .case-section { grid-template-columns: 1fr; gap: 16px; padding-block: 24px; }
  .case-demo .lab { padding: 24px 18px; }
  .case-demo > summary { padding-inline: 20px; }
}
@media (max-width: 540px) {
  .header { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 8px 16px; padding-block: 12px; }
  .header > .light-switch { grid-column: 2; grid-row: 1; }
  .header nav { grid-column: 1 / -1; grid-row: 2; width: 100%; margin-left: 0; justify-content: space-between; gap: 10px; }
  .header nav a { font-size: .85rem; }
  .light-switch { font-size: .82rem; gap: 8px; padding: 8px 10px; }
  .hero h1 { font-size: clamp(2.8rem, 10.4vw, 3.6rem); }
  .hero-actions { align-items: start; flex-direction: column; gap: 12px; }
  .footer { gap: 12px 18px; }
  .footer p { margin-left: 0; text-align: left; }
  .footer > a:last-child { margin-left: 0; }
}
@media (max-width: 380px) {
  .home .header { padding-inline: 14px; column-gap: 8px; }
  .hero-specialty { font-size: .66em; }
  .hero-role { font-size: .8em; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  a, button, .trace-steps li { transition-duration: 0ms !important; }
  ::view-transition-old(component-note), ::view-transition-new(component-note), ::view-transition-old(workflow-note), ::view-transition-new(workflow-note) { animation: none; }
}
@media print {
  .lantern-wall, .home::before, .light-switch, .case-demo { display: none; }
  .home .hero, .home .selected-work, .home .about { border: 0; background: white; }
}
/* Capture each lighting state once; blend the two rendered pages. */
:root[data-light-changing] * { transition: none !important; view-transition-name: none !important; }
:root[data-light-changing]::view-transition,
:root[data-light-changing]::view-transition-group(root),
:root[data-light-changing]::view-transition-image-pair(root) { pointer-events: none; }
:root[data-light-changing]::view-transition-old(root) { animation: light-out 420ms ease both; mix-blend-mode: normal; pointer-events: none; }
:root[data-light-changing]::view-transition-new(root) { animation: light-in 420ms ease both; mix-blend-mode: normal; pointer-events: none; }
@keyframes light-out { to { opacity: 0; } }
@keyframes light-in { from { opacity: 0; } to { opacity: 1; } }


/* Mark the current document independently of the contact action. */
.header nav .nav-contact { border-bottom-color: transparent; }
.header nav a[aria-current="page"] { border-bottom: 1px solid var(--blue); color: var(--blue); }